At root what is needed for scientific inquiry is just receptivity to data, skill in reasoning, and yearning for truth. Admittedly, ingenuity can help too.

No man is happy who does not think himself so.

Let those flatter who fear; it is not an American art. To give praise which is not due might be well from the venal, but would ill beseem those who are asserting the rights of human nature. They know, and will therefore say, that kings are the servants, not the proprietors of the people.

One has only as much morality as one has philosophy and poetry.

Then are the children free. Notwithstanding, lest we should offend them, go thou to the sea, and cast an hook, and take up the fish that first cometh up; and when thou hast opened his mouth, thou shalt find a piece of money: that take, and give unto them for me and thee.

In the metaphysical elements of aesthetics the various nonmoral feelings are to be made use of; in the elements of moral metaphysics the various moral feelings of men, according to the differences in sex, age, education, and government, of races and climates, are to be employed.

Our design, not respecting arts, but philosophy, and our subject, not manual, but natural powers, we consider chiefly those things which relate to gravity, levity, elastic force, the resistance of fluids, and the like forces, whether attractive or impulsive; and therefore we offer this work as mathematical principles of philosophy; for all the difficulty of philosophy seems to consist in this - from the phenomena of motions to investigate the forces of nature, and then from these forces to demonstrate the other phenomena...

In the days before machinery men and women who wanted to amuse themselves were compelled, in their humble way, to be artists. Now they sit still and permit professionals to entertain them by the aid of machinery. It is difficult to believe that general artistic culture can flourish in this atmosphere of passivity.

Never express yourself more clearly than you are able to think.

You won't - I really believe - get too much out of reading it. Because you won't understand it; the content will seem strange to you. In reality, it isn't strange to you, for the point is ethical. I once wanted to give a few words in the foreword which now actually are not in it, which, however, I'll write to you now because they might be a key for you: I wanted to write that my work consists of two parts: of the one which is here, and of everything which I have not written. And precisely this second part is the important one.

Quite apart from assiduous efforts to restrict the use of violence as means rather than an end, the actualization of violence as a means can inadvertently become its own end, producing new violence, producing violence anew, reiterating the license, and licensing further violence. Violence does not exhaust itself in the realization of a just end; rather, it renews itself in directions that exceed both deliberate intention and instrumental schemes. In other words, by acting as if the use of violence can be a means to achieve a nonviolent end, one imagines that the practice of violence does not in the act posit violence as its own end. The technē is undermined by the praxis, and the use of violence only makes the world into a more violent place, by bringing more violence into the world.

The reasons for persisting in Being seem less and less well founded, and our successors will find it easier than we to be rid of such obstinacy.

'BUT science and art! You are denying science and art: that is you are denying that by which humanity lives.' People constantly make this rejoinder to me, and they employ: this method in order to reject my arguments without examination. 'He rejects science and art, he wishes man to revert to a state of savagery - why listen to him or discuss with him?' But this is unjust. Not only do I not repudiate science, that is, the reasonable activity of humanity, and art - the expression of that reasonable activity - but it is just on behalf of that reasonable activity and its expression that I speak, only that It may be possible for mankind to escape from the savage state into which it is rapidly lapsing thanks to the false teaching of our time. It is only on that account that I speak as I do.

If conquest constitutes a natural right on the part of the few, the many have only to gather sufficient strength in order to acquire the natural right of reconquering what has been taken from them.

What remains is the remarkable and, for many, certainly disquieting diagnosis that all genuine political theories presuppose man to be evil, i.e., by no means an unproblematic but a dangerous and dynamic being.

No rules, however wise, are a substitute for affection and tact.

Surely if a single cell may, when subjected to certain influences, become a man in the space of twenty years; there is nothing absurd in the hypothesis that under certain other influences, a cell may, in the course of millions of years, give origin to the human race.

Besides, we should never attempt to balance anybody's misery against somebody else's happiness.

'Our kingdom go' is the necessary and unavoidable corollary of 'Thy kingdom come.' For the more there is of self, the less there is of God.

Perfect is the virtue which is according to the Mean! Rare have they long been among the people, who could practice it!

The most advanced nations are always those who navigate the most.

Never till now, in the history of an Earth which to this hour nowhere refuses to grow corn if you will plough it, to yield shirts if you will spin and weave in it, did the mere manual two-handed worker (however it might fare with other workers) cry in vain for such "wages" as he means by "fair wages," namely food and warmth!

The American who first discovered Columbus made a bad discovery.

In the most secret chamber of the spirit of him who believes himself convinced that death puts an end to his personal consciousness, his memory, for ever, and all unknown to him perhaps, there lurks a shadow, a vague shadow, a shadow of uncertainty, and while he says within himself, "Well, let us live this life that passes away, for there is no other!" the silence of this secret chamber speaks to him and murmurs, "Who knows!... " These voices are like the humming of a mosquito when the south-west wind roars through the trees in the wood; we cannot distinguish this faint humming, yet nevertheless, merged in the clamor of the storm, it reaches the ear.

The study of Ethics would, no doubt, be far more simple, and its results far more "systematic," if, for instance, pain were an evil of exactly the same magnitude as pleasure is a good; but we have no reason whatever to assume that the Universe is such that ethical truths must display this kind of symmetry ... .

The chief requirement of the good life... is to live without any image of oneself.

A widow, the mother of a family, and from her heart she produces chords to which my whole being responds.

I am for the most part so convinced that everything is lacking in basis, consequence, justification, that if someone dared to contradict me, even the man I most admire, he would seem to me a charlatan or a fool.

Not without a slight shudder at the danger, I often perceive how near I had come to admitting into my mind the details of some trivial affair, - the news of the street; and I am astonished to observe how willing men are to lumber their minds with such rubbish, - to permit idle rumors and incidents of the most insignificant kind to intrude on ground which should be sacred to thought. Shall the mind be a public arena, where the affairs of the street and the gossip of the tea-table chiefly are discussed? Or shall it be a quarter of heaven itself, - an hypæthral temple, consecrated to the service of the gods? I find it so difficult to dispose of the few facts which to me are significant, that I hesitate to burden my attention with those which are insignificant, which only a divine mind could illustrate. Such is, for the most part, the news in newspapers and conversation. It is important to preserve the mind's chastity in this respect.

In all European countries, especially in England, one class of Captains and commanders of men, recognizable as the beginning of a new real and not imaginary "Aristocracy," has already in some measure developed itself: the Captains of Industry;-happily the class who above all, or at least first of all, are wanted in this time. In the doing of material work, we have already men among us that can command bodies of men. And surely, on the other hand, there is no lack of men needing to be commanded: the sad class of brother-men whom we had to describe as "Hodge's emancipated horses," reduced to roving famine,-this too has in all countries developed itself; and, in fatal geometrical progression, is ever more developing itself, with a rapidity which alarms every one. On this ground, if not on all manner of other grounds, it may be truly said, the "Organization of Labor" (not organizable by the mad methods tried hitherto) is the universal vital Problem of the world.

When one is not understood one should as a rule lower one's voice, because when one really speaks loudly enough and is not heard, it is because people do not want to hear. One had better begin to mutter to oneself, then they get curious.

I am old, but I certainly have not that sign of old age, extolling the past at the expense of the present.

Under the natural course of things each citizen tends towards his fittest function. Those who are competent to the kind of work they undertake, succeed, and, in the average of cases, are advanced in proportion to their efficiency; while the incompetent, society soon finds out, ceases to employ, forces to try something easier, and eventually turns to use.

Over the years it has become my firm opinion that sexual activity (even if only through masturbation) is "requisite and necessary, as well for the body as for the soul"; for men and women alike. It stimulates your glands, exercises your pelvis, thrills your nerves, brings mind and body together as one, and culminates in an ecstasy in which there is neither past nor future nor separation between self and other. We need that as we need vitamins, proteins, water, and air.

For those of us who have been thrown into hell, mysterious melodies and the torturing images of a vanished beauty will always bring us, in the midst of crime and folly, the echo of that harmonious insurrection which bears witness, throughout the centuries, to the greatness of humanity.

The supreme accomplishment is to blur the line between work and play.

Sabbath rest does not follow creation; it brings creation to completion.

We have not made the Revolution, the Revolution has made us.

There is no man so good, who, were he to submit all his thoughts and actions to the laws, would not deserve hanging ten times in his life.

I do see one large and grievous kind of ignorance, separate from the rest, and as weighty as all the other parts put together. Thinking that one knows a thing when one does not know it. Through this, I believe, all the mistakes of the mind are caused in all of us.

Life inspires more dread than death - it is life which is the great unknown.

A major task in organizing is to determine, first, where the knowledge is located that can provide the various kinds of factual premises that decisions require.

There never comes a point where a theory can be said to be true. The most that one can claim for any theory is that it has shared the successes of all its rivals and that it has passed at least one test which they have failed.

Ironic philosophies produce passionate works. Any thought that abandons unity glorifies diversity! And diversity is the home of art. The only thought to liberate the mind is that which leaves it alone, certain of its limits and of its impending end. No doctrine tempts it. It awaits the ripening of the work and of life.

Who is the most moral man? First, he who obeys the law most frequently, who ... is continually inventive in creating opportunities for obeying the law. Then, he who obeys it even in the most difficult cases. The most moral man is he who sacrifices the most to custom. ... Self-overcoming is demanded, not on account of any useful consequences it may have for the individual, but so that hegemony of custom and tradition shall be made evident.

I never turned recreant to intellectual culture, or ceased to consider the power and practice of analysis as an essential condition both of individual and of social improvement. But I thought that it had consequences which required to be corrected, by joining other kinds of cultivation with it. The maintenance of a due balance among the faculties, now seemed to me of primary importance. The cultivation of the feelings became one of the cardinal points in my ethical and philosophical creed.